<div id="conteudo">
    <?php echo $error; ?>
    <form action="./usuario/loadbatch" method="post" accept-charset="utf-8" enctype="multipart/form-data"> 
        <fieldset>
            <legend>Carga de alunos em lote</legend>
            <label for="arquivo">Arquivo CSV
                <input type="file" name="userfile" accept=".csv" size="20" />
            </label>
            <button type="submit">OK</button>
        </fieldset>
    </form>
</div>